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Create db migrations framework

This commit is contained in:
Peter Smit 2015-01-22 14:49:52 +02:00
parent 161774d4fb
commit bb103e8723
2 changed files with 53 additions and 0 deletions

View file

@ -0,0 +1,47 @@
package migrations
import (
"errors"
"github.com/go-xorm/xorm"
)
type migration func(*xorm.Engine) error
// The version table. Should have only one row with id==1
type Version struct {
Id int64 `xorm:"pk"`
Version int64
}
// This is a sequence of migrations. Add new migrations to the bottom of the list.
// If you want to "retire" a migration, replace it with "expiredMigration"
var migrations = []migration{}
// Migrate database to current version
func Migrate(x *xorm.Engine) error {
x.Sync(new(Version))
currentVersion := &Version{Id: 1}
has, err := x.Get(currentVersion)
if err != nil {
return err
}
if !has {
_, err = x.InsertOne(currentVersion)
}
v := currentVersion.Version
for i, migration := range migrations[v:] {
if err = migration(x); err != nil {
return err
}
currentVersion.Version = v + int64(i) + 1
x.Id(1).Update(currentVersion)
}
return nil
}
func expiredMigration(x *xorm.Engine) error {
return errors.New("You are migrating from a too old gogs version")
}

View file

@ -15,6 +15,7 @@ import (
"github.com/go-xorm/xorm"
_ "github.com/lib/pq"
"github.com/gogits/gogs/models/migrations"
"github.com/gogits/gogs/modules/setting"
)
@ -131,6 +132,11 @@ func NewEngine() (err error) {
if err = SetEngine(); err != nil {
return err
}
if err = migrations.Migrate(x); err != nil {
return err
}
if err = x.StoreEngine("InnoDB").Sync2(tables...); err != nil {
return fmt.Errorf("sync database struct error: %v\n", err)
}